32 THE FAUNA OF SCOTLAND. 



10. N. CANALICULATUS, Htg. 



= stenogasteVf Foer. = pleuralis, Thorns. 



Very rare. Imago in June. It was bred by Brischke from a larva 

 indistinguishable from that of Nematus umbripennis, Evers., from aspen. 

 The larva of umhripennis is stated to be slender, narrowed posteriorly, of 

 a clear bluish-green colour, with shining head, black eye-spots, and dark 

 mouth. The dark dorsal canal is bordered on each side by a thin white 

 line, and another very thin white line is on the sides, at the spiracles. 

 The segmental divisions are white. Sometimes the skin-folds over the 

 legs bear two rows of fine black tubercles. At the last moult it becomes 

 clear shining grass-green. 



One specimen near Lairg, Sutherlandshire, on birch. 



11. N. PROBLEMATicus, Cameron. 



Very rare. Imago in June. Larva unknown. 

 Braemar (Dr White). 



12. N. HYPERBOREUS, Thoms. 



Very rare. Imago in June. Larva unknown. 

 Braemar (Dr Sharp). 



My specimens scarcely agree in toto with Thomson's description, but do 

 not differ to such a great extent as to consider our species distinct. 



13. N. CLiBRiCHELLUS, Camewn, sp. n. 



Male. — Antennae black, as long as the body, almost bare, slightly 

 flattened, each joint drawn out to a truncated bead-like point at the apex, 

 which is thicker than the base of the succeeding joint; the 4th joint is 

 distinctly longer than the 3d, the rest become gradually shorter and 

 thinner. Head black, sparsely covered with longish black hair; the 

 vertex finely punctured; frontal area distinct; palpi black. Thorax 

 smooth, shining, sparsely covered with long black hair; pleurae scarcely 

 so shining as the mesonotum, punctured, and covered with long black 

 hair; the cenchri are very pale white. Abdomen slightly punctured at 

 base, the last segment, and the gaping anal lobes, sordid testaceous. Legs 

 black; the coxae and base of tibiae sordid testaceous; the posterior tibiae 

 totally black; the four anterior tarsi are longer than the tibiae; the 

 posterior are also longer, but not so long in proportion as the anterior; 

 spurs very short. Wings hyaline, nervures black, the costa and stigma 

 sordid white; the 1st sabmarginal cellule is small, its nervure very pale; 

 the second is almost double the length of 3d, and forms a very sharp angle 

 where it receives the 1st recurrent nervure; the 3d is a very little 

 widened at the apex. Tegulae black. 



Length, a little more than 3 lines. 



At the first examination I took this to be the iindescribed male of 



